I stopped by Flywheel this morning. It's the store just north of the Wholefoods on Stanyan. The space is still in progress, but its wood and modern design are reminiscent of Haus or Four Barrel. The coffee is a similar style as well, though the owner mentioned having roots with the much older Martha & Brothers.
I''m a fan of acidic coffee, and i found the espresso's acidity pretty high, more so even than Sightglass or Ritual. It didn't have that over-roasted taste you get from Blue Bottle, but the espresso lacked the right viscosity. I'll definitely be back periodically to see their progress.